Pump



J. B. JENSEN.

- PUMP.-

' APPLICATION'FILED MAY 6, 1920- 1,406,868.

Patented Feb. 14, 1922.

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WITNESS 6.

A TTORNE Y.

J. B. JENSEN.

PUMP.

APPLICATION FILED MAY 6. 1920.

1 ,406,868 Patented Feb. 14, 1922.

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V IN VENTOR WITNESS .7," B. Jz'wszw and axially aligned therewith are a plurality ot guide blades 27 defining a plurality of fluid guide passages 28. Each of the blades is substantially segmental in form and is preferably disposed about the pump axis in the: form of a short helix. Furthermore the blades are arranged in such a manner that the jets of fluid issuing tom the guide passages will be directed in the direction oi? rotation of the adjacent portion of the impeller. Accordingly, referring to Figure l in which the pump shaft rotates in the direction indicated by the arrows, the guide blades 29 at the left of the impeller will be disposed in dextrorsal relation, While the blades 31 at the right of the impeller will be disposed in sinistrorsal relation.

As has been heretofore mentioned the end walls 22 and 23 converge in the direction of the tips of the vanes, or in other words the walls 22 adjacent the dextrorsal blades are disposed in sinistrorsal relation, while the walls 23 adjacent the sinistrorsal bladesare disposed in dextrorsal relation. Referring now more particularly to Figure 3 it will be clearly unlerstood that when the end walls, which broadly speaking, function as pump blades, sweep by the guide blades, the partial vacuum existing between the vanes is considerably augmented, thereby causing theentire amount of fluid issuing from the guide passages to be quickly drawn into the impeller. Furthermore as aforementioned the streams of the fluid enter the impeller in the direction of rotation thereof, so that the fluid prior to being acted, upon by the vanes has already attained the motionwhich the vanes are to impart to it. In this man'- ner part of the work, ordinarily performed by the impeller, is done through the agency of the guide blades, thereby enabling the former to perform its work more efliciently and to act upon a greater amount of fluid.

I claim:

1. A pump comprising a casing having a suction and a delivery chamber, an impeller rotatably mounted therein, a radially disposed vane and a dextrorsally disposed end plate formed on said impeller, and a sinistrorsally disposed passage in the suction chamber adjacent said impeller.

2. A pump comprising a casing having a suction and discharge chamber, an impeller rotatably mounted therein, a radially dis posed vane and a sinistrorsally disposed end plate formed on said impeller, and a, dex-' trorsally disposed passage in said suction chamber adjacent said impeller.

3. A pump comprising a casing having a suction chamber, an impeller rotatably mounted in said casing and communicating with said chamber at opposite ends, a dextrorsally disposed end wall and a sinistrorsally disposed end wall formed on said impeller, a radially disposed vane formed beverging walls formed on opposite ends of said vanes adjacent their tips, a plurality of dextrorsally disposed fluidguide passages arranged in said suction chamber adjacent one of said end walls, and a plurality of sinistrorsally disposed fluid guide passages arranged in said suction chamber adjacent the other of said end walls.

5. A pump comprising a casing having a suction chamber and an involute delivery chamber, an impeller rotatably mounted in said casing having its sides and opposite ends in communication with the delivery and suction chambers respectively, a plurality of outwardlycurved radial vanes formed on said impeller, walls extending outward radially from the opposite ends of said vanes and converging in the direction of the vane tips, said walls being omitted adjacent the rear face of the vanes, dextrorsally disposed guide blades iixed in said suction chamber adjacent one end of said vanes, and

'sinistrorsally disposed guide-blades disposed in said chamber adjacent the other end of said vanes. i

6 A pump comprising a casing having an involute delivery chamber formed centrally therein, a suction chamber formed on opposite ends of said'delivery chamber, an impeller rotatably mounted -within said delivery chamber and communicating at opposite ends with said suction chamber, radial vanes formed on said impeller, walls formed at the opposite ends of said vanes and converging in the direction of the vane tips, said walls being omitted adjacent the base of said vanes to provide end openings in the impeller, a plurality of spaced dextrorsally disposed blades fixed inthe suction chamber adjacent one end of said impeller and defining a set of radially disposed guide passages adapted to register with the openings in said end of the impeller, and a plurality of spaced sinistrorsally disposed blades fixed inthe suction chamber adjacent the other end of said impeller and defining a set of radially disposed guide passages adapted to register with the o 'ienings in said last mentioned end of the impeller. v

7. A pump comprising a casing having a suction and delivery chamber, an impeller rotatably mountedin', said casing, inclined passages in said suction chamber adapted to guide the fluid to said impeller in the direcimpeller, and an end wall on said impeller tion of rotation thereof, and an end Wall on extending from one side of each blade toward said impeller inclined reversely of said pasthe adjacent side or" the next blade, said Wall sages. being spaced from said latter blade from 5 8. A pump comprising a casing having a the base to substantially the outer edge 15 suction and delivery chamber, an impeller thereof. rotatably mounted in said casing, inclined In testimony whereof, I have hereunto set passages in said suction chamber adapted my hand at Oakland, California, this 7th to guide the fluid to said impeller in the diday of April, 1920.

10 reetion of rotation thereof, blades on said JULIAN B. JENSEN. 

